These amazing animals are among the heaviest dinosaur that ever lived. Although his body resembled that of other sauropods, surpassed in size to most of its peers. It was about 25 times heavier than a giraffe long as three buses and as tall as a six-story building. Its neck and tail, incredibly long, were supported by a backbone like a grill. At the sides of the vertebrae, there were some openings that reduce weight without weakening his back. Most of the weight of its giant dinosaur bore members. Therefore, major bones were the blades, connecting the front legs with the body. The was large and strong, each of them would be higher than a soccer goal. His back was lower than their shoulders, as the hind legs were shorter than the front. When grazing among the plants and bushes, swinging his long neck in all directions. It could reach the juicy leaves of higher tops and low ferns. I needed lots of vegetation, cutting his teeth beveled. For easier digestion, probably swallowed small rocks that were deposited in your belly and helped to turn plants into pulp. Although hard to imagine, experts have suggested that brachiosaurids like this, roamed in herds slowly advancing. Surely the ground shake under their feet. The sheer size of an animal as this dinosaur probably deterred most predators living at the time. But if one is away from the bequest, was exposed to grave danger. On the inside of his legs, like those of elephants, had a sharp claw. With an accurate kick and a flick of its tail flexible, could bring down his enemy. Measuring up to 30 meters long and a little more than 15 high. It lived about 145 million years, at the end of the Jurassic period in North America.

Curious: There is another dinosaur called Ultrsaurus, but not the same, is smaller and fossils found in Asia.

This bird, sometimes called the Giant Teratorn, is an extinct species known (as of 2006) from three sites from the late Miocene (6 million years before present) of central and northwestern Argentina, where a good sample of fossils has been obtained.[1]

The humerus (upper arm bone) of Argentavis is somewhat damaged. It allows a fairly accurate estimate of its length in life, which was a bit shorter than an entire human arm.[2] The species apparently had stout, strong legs and large feet which enabled it to walk with ease. The bill was large, rather slender, had a hooked tip with a wide gape.

Currently accepted estimates:

Wingspan: 5.8–8 m (19 – 26 ft) Wing area: nearly 7 m² (75 square ft) Wing loading: c. 11.5 kg/m² Length: 3.5 m (11.5 ft) Height: 1.7–2 m (5.6–6.5 ft) Weight: 60–80 kg (140–180 lb) For comparison, the living bird with the largest wingspan is the Wandering Albatross (3.63 m). Since A. magnificens is known to have been a land bird, another good point of comparison is the Andean Condor, which is not too distantly related to Argentavis. This bird is among the largest land birds, with a wingspan of about 3 m and weighing up to 12 kg.

The ability to fly is not a simple question of weight, except in extreme cases. Size and structure of the wing must also be taken into account. As a rule of thumb, a wing loading of 25 kg/m² is considered the limit for avian flight.[3]

The heaviest extant flying bird is not heavier than 20 kg (there are several contenders, among which are the European Great Bustard and the African Kori Bustard). The Sarus Crane is the tallest flying bird alive, standing nearly as high as Argentavis due to its long legs.

The largest known flying creatures are a group of pterosaurs named azhdarchids, extinct flying animals that existed during the age of the dinosaurs and died out at the end of the Cretaceous. Estimations of the wingspan of the largest species like Quetzalcoatlus and Hatzegopteryx exceeds 10 m, with less conservative estimates being 12 m or more.